VK_NV_push_constant_bank(3) Manual Page

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VK_NV_push_constant_bank

The VK_NV_push_constant_bank extension allows applications to specify a bank and offset for push constants, enabling more flexible push constant management in descriptor heap scenarios where shaders are able to access different root descriptors.

Traditional push constants are placed in a default location, but this extension allows applications to specify which hardware constant bank to use and at what offset within that bank. This provides greater control over memory layout and enables more efficient use of hardware resources in advanced descriptor heap configurations.

The extension integrates with VK_EXT_descriptor_heap by allowing VkPushConstantBankInfoNV structures to be chained to VkDescriptorSetAndBindingMappingEXT, VkPushDataInfoEXT, VkPushConstantsInfo, or VkIndirectCommandsLayoutTokenEXT structures, specifying the hardware bank where push constants should be placed as part of the descriptor heap mapping configuration or push data operations.

Key features include:

The number of available push constant banks is implementation-dependent and can be queried through separate limits in VkPhysicalDevicePushConstantBankPropertiesNV: maxGraphicsPushConstantBanks and maxComputePushConstantBanks for non-descriptor heap usage, and maxGraphicsPushDataBanks and maxComputePushDataBanks for descriptor heap scenarios. Applications must ensure bank indices remain within the appropriate implementation-defined range based on the shader type and usage context.

Shader support for banks and member offsets are defined by the SPV_NV_push_constant_bank SPIR-V extension, which can be used with the GLSL_NV_push_constant_bank GLSL extension.

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No cross-references are available

For more information, see the Vulkan Specification.

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